1FEATURES
2• 2.25V to 5.5V Input Voltage Range
• 1.8V Fixed Output Voltage
• 800 mA Output Load Current
• +/- 2.5% VOUT Accuracy over Line, Load, and
Full-Temperature Range from -40°C to +125°C
• Stable with tiny 10 μF Ceramic Capacitors
• 0.20% Output Voltage Load Regulation from 10
mA to 800 mA
• Enable pin
• Error Flag Indicates Status of Output Voltage
• 1 μA of Quiescent Current in Shutdown
• 40dB of PSRR at 100 kHz
• Over-Temperature and Over-Current
Protection
• DDPAK/TO-263 and PFM Surface Mount
Packages

APPLICATIONS
• Digital Core ASICs, FPGAs, and DSPs
• Servers
• Routers and Switches
• Base Stations
• Storage Area Networks
• DDR2 Memory

DESCRIPTION
The LP38511-1.8 Fast-Transient Response Low-
Dropout Voltage Regulator offers the highest-
performance in meeting AC and DC accuracy
requirements for powering Digital Cores. The
LP38511-1.8 uses a proprietary control loop that
enables extremely fast response to change in line
conditions and load demands. Output Voltage DC
accuracy is specified at ±2.5% over line, load and full
temperature range from -40°C to +125°C. The
LP38511-1.8 is designed for inputs from the 2.5V,
3.3V, and 5.0V rail, is stable with 10uF ceramic
capacitors, and has a fixed 1.8V output. An Error Flag
feature monitors the output voltage and notifies the
system processor when the output voltage falls more
than 15% below the nominal value. The LP38511-1.8
provides excellent transient performance to meet the demand of high performance digital core ASICs,
DSPs, and FPGAs found in highly-intensive
applications such as servers, routers/switches, and
base stations.